[Intel-gfx] [PATCH] Fix i965 textured video for UXA (and general cleanup)

[Eric Anholt]

This is the patch series I came up with for getting i965 textured video working
with UXA.  It's not the minimal patch, as I started with cleanup, then moved
everything to BOs, then did the pixmap relocations.  Along the way more syncing
was removed and the state upload per frame was cut drastically.  However, for
2.6 branch we may want to just include the minimum to get UXA working, which
would be about 2 commits: surface state and binding table to BOs, and emitting
proper relocs.